#4F91CF
Closest named color: Faded Blue (#658CBB). oklch(64% 0.116 248.7), rgb(79, 145, 207).
Aa
Black text reads best on this color (6.28:1).
About this color
#4F91CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.116 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.034 away. Black text reads best on it, at 6.28:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.28:1 |
| White text | 3.34:1 |
Values
| HEX | #4F91CF |
| RGB | rgb(79, 145, 207) |
| HSL | hsl(209, 57%, 56%) |
| OKLCH | oklch(64% 0.116 248.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4F91CF | 3.34:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #4F91CF | 6.28:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #4F91CF text on white | 3.34:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #4F91CF text on black | 6.28:1 | AA | Lc -41.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C4E4
oklch(80.8% 0.056 249.4)
-
Step 400
400
#73A5D7
oklch(70.6% 0.091 249.2)
-
Step 500
500 (this color)
#4F91CF
oklch(64% 0.116 248.7)
-
Step 600
600
#2C77B9
oklch(55.5% 0.126 248.8)
-
Step 700
700
#1E649F
oklch(49.1% 0.116 248.6)
-
Step 800
800
#1C5281
oklch(42.8% 0.096 248.6)
-
Step 900
900
#1D4468
oklch(37.7% 0.076 248.9)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#4F91CF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #7693D2 | 0.043 |
| Deuteranopia (no green cones) | #6587CE | 0.033 |
| Tritanopia (no blue cones) | #00A0A7 | 0.092 |
| Achromatopsia (no color) | #8C8C8C | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F91CF
#4F91CF
oklch(64% 0.116 248.7)
- #B97E34
#B97E34
oklch(64% 0.115 68.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4F91CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.047
- Water Blue #0E87CC ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.051
- Dusty Blue #5A86AD ΔE 0.053
- Off Blue #5684AE ΔE 0.054
Use #4F91CF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.